Pocket Watch Database
Patent Archive
#2146499
Patent Information
Clock Movement Electric
Frederick Roy Butherus
February 7, 1939
Patent #2146499
| Patent Number: | 2146499 |
| Description: | Clock Movement Electric |
| Inventor(s): | Frederick Roy Butherus |
| Assignee: | Sangamo Electric Co |
| Patent Date: | Feb 7, 1939 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
